Temperature range and temperature limit for pressure sensors ? is there a difference? My intuitive answer will be: Yes! The first term describes a section and the next its border. On second glance, however, I must conclude that both words ultimately express a similar thing with regards to temperatures: Range and limit are defined by a lower and upper value, for example 0 ? 100 �C. The relevant standard nevertheless defines a difference. Why?
IEC 61987 speaks of two different specification characteristics
The standard referred to is IEC 61987. This deals, among other things, with the properties of fluid sensors, which likewise incorporate pressure sensors. With ?range? and ?limit?, the typical designates two different specification characteristics. Accordingly, the temperature range describes the span in which the instrument specifications must apply ? first of เครื่องมือที่ใช้วัดความดันคือ , the accuracy. The temperature limit, alternatively, indicates the min/max values between that your instrument could be operated without damage. With this particular, the instrument specifications do not have to be honored at all.
What may sound a bit pedantic, makes sense from a technical point of view. This can be illustrated by the following example of a pressure sensor: The instrument is supposed to deliver solid measured values at an ambient temperature range of 0 ? 100 �C. Simultaneously, the sensor should never suffer any damage at ambient temperatures between -20 �C and 0 �C. In this range, however, it does not need to provide accurate measuring results, or even measure.
The difference between temperature range and temperature limit is plausible
This sounds paradoxical initially, but is plausible on closer inspection. Pressure sensor elements, i.e. the actual measuring components, exhibit a relatively large, often non-linear temperature error. Without further measures, a trusted pressure measurement will be impossible. Therefore, the maker has to compensate for the temperature so that you can bring the error right down to an acceptable level. From an economic viewpoint, the limitation to a selected temperature range is practical, or is even absolutely necessary.
The distinction between temperature range and temperature limit pertains to both ambient temperature and the medium temperature. Additionally it is useful for other specification characteristics, for example overpressure.
Conclusion
Yes, you will find a difference between range and limit in the normative world of pressure sensor technology. And yes, it creates technical sense. However, I doubt if the normal user, without understanding of standards, understands it intuitively. Which inevitably leads to the question of whether you will find a better linguistic distinction. But, I have to admit, the solution is outside my ?range?.
Note
More info on our pressure sensors are available on the WIKA website. Do you want to buy pressure sensors? You will discover some of our standard designs inside our WIKA online-shop. In case you have any questions, your contact will gladly assist you to.
Also read our posts
What does temperature compensation or compensated temperature range for pressure sensors mean?
Active and passive temperature compensation of pressure sensors
Temperature coefficients (TC) of pressure sensors